# CVE-2023-50104: File upload in n/a

> Attackers can upload malicious files to ZZCMS to execute arbitrary code and gain server privileges.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Dec 2023
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-j37f-j5pq-r37j

## What is CVE-2023-50104?

CVE-2023-50104 is a critical vulnerability in Zzcms Zzcms, published on 28 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

ZZCMS 2023 has a file upload vulnerability in 3/E_bak5.1/upload/index.php, allowing attackers to exploit this loophole to gain server privileges and execute arbitrary code.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2023-50104?

It affects 1 product.


Products: Zzcms Zzcms.

## How do I fix CVE-2023-50104?

No fix has been published for CVE-2023-50104 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-50104 being exploited?

There is no known exploitation of CVE-2023-50104 in the wild and no public exploit code.

## Other vulnerabilities in Zzcms Zzcms

- [CVE-2025-22957](https://insights.sbomify.com/CVE-2025-22957/): SQL injection in n/a (critical 9.8)
- [CVE-2024-52724](https://insights.sbomify.com/CVE-2024-52724/): SQL injection in n/a (critical 9.8)
- [CVE-2023-42398](https://insights.sbomify.com/CVE-2023-42398/): Server-side request forgery in n/a (critical 9.8)
- [CVE-2019-12349](https://insights.sbomify.com/CVE-2019-12349/): SQL injection in n/a (critical 9.8)
- [CVE-2019-12350](https://insights.sbomify.com/CVE-2019-12350/): SQL injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-50104 and fix it if it is affected.

What it is: CVE-2023-50104 is a critical vulnerability in Zzcms Zzcms, published on 28 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-50104 in the wild and no public exploit code.

Affected product: Zzcms Zzcms. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-50104/ (Markdown: https://insights.sbomify.com/CVE-2023-50104/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-50104
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-50104
- OSV: https://osv.dev/vulnerability/CVE-2023-50104

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-50104/
Summaries are generated and may contain mistakes; the official description above is the record.